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The Best Episodes of It's Always Sunny in Philadelphia Season 18

Every episode of It's Always Sunny in Philadelphia Season 18 ranked from best to worst. Discover the Best Episodes of It's Always Sunny in Philadelphia Season 18!

Binge this in 3h 43m·Peaking at 9.0/10
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Episode Rankings

  1. #1 Fan Favorite
    It's Always Sunny in Philadelphia Season 18 Episode 10 - The Guys Have a Sleepover
    9.0/10(1000 votes)

    S18:E10

    Blinded from LASIK surgery, Dee pleads for the guys to spend the night to keep her safe from neighborhood crime, but they listen to the wolves inside themselves and opt for a dudes-only sleepover of their own.

    Director:Todd Biermann
    Writers:Glenn Howerton, Charlie Day

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  2. It's Always Sunny in Philadelphia Season 18 Episode 9 - Frank's Team: A Dark Day for Baseball
    8.5/10(1019 votes)

    S18:E9

    In an effort to clean up their image, Paddy's sponsors a local Little League team. But when The Gang spots softness in their franchise, they impose a radical new culture: win no matter what and do whatever it takes to get ahead.

    Director:Heath Cullens
    Writers:Rob Mac, Charlie Day, Ross Maloney

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  3. It's Always Sunny in Philadelphia Season 18 Episode 5 - The Gang Goes to the Ren Faire
    8.2/10(1307 votes)

    S18:E5

    Mac, Dennis, and Dee strive to conquest their way onto the Quilt of Legends at the local Renaissance Faire. Charlie discovers a love of luting while Frank tries to acquire the faire from old foes.

    Director:Richie Keen
    Writers:Rob Rosell, Dave Chernin, John Chernin

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  4. It's Always Sunny in Philadelphia Season 18 Episode 6 - The War on Alcohol
    8.1/10(1098 votes)

    S18:E6

    The Gang takes the trend against drinking into their own hands. Dennis, Dee, and Frank look to recruit white collar suits for happy hour while Mac and Charlie seek to enlist blue collar factory workers so they can return the bar to the melting pot it once was.

    Directors:Dave Chernin, John Chernin
    Writers:Dave Chernin, John Chernin

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  5. It's Always Sunny in Philadelphia Season 18 Episode 2 - Dennis and Dee Don't Get Rich
    8.0/10(1437 votes)

    S18:E2

    The Reynolds twins push themselves to the limit to secure Sam's transfer of wealth. Charlie and Frank plan a proper memorial for Bonnie during the annual Mummers Parade.

    Director:Todd Biermann
    Writer:Charlie Day

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  6. It's Always Sunny in Philadelphia Season 18 Episode 3 - The Gang Gets Tested
    8.0/10(1369 votes)

    S18:E3

    Dennis and Dee are diagnosed with ADHD, and even more shocking: Mac isn't. They go back to school for a do-over now that they understand their brains more better.

    Director:Richie Keen
    Writer:Charlie Day

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  7. It's Always Sunny in Philadelphia Season 18 Episode 1 - Frank Marries a Corpse
    7.8/10(1553 votes)

    S18:E1

    The guys help Frank with his cold feet ahead of his wedding to Sam. Dee tries to scare Sam off the nuptials with testimonies from The Waitress, Artemis, and Snail.

    Director:Todd Biermann
    Writer:Charlie Day

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  8. It's Always Sunny in Philadelphia Season 18 Episode 4 - 2026: A Virtual Insanity
    7.4/10(1295 votes)

    S18:E4

    The Gang's RV breaks down en route to a Jamiroquai concert, leaving them to fend for themselves in a dangerous wasteland of junkies and street people.

    Director:Heath Cullens
    Writers:Rob Rosell, Vanessa McGee

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  9. It's Always Sunny in Philadelphia Season 18 Episode 8 - Mac and Dennis Tear Their ACLs
    7.4/10(879 votes)

    S18:E8

    After a Christmas card catastrophe, Charlie nurses a bedridden Mac and Dennis and deliberates on which one is the originator of all their ideas. Dee and Frank are tired of being the bottom of the communication ladder and decide to flip the script.

    Director:Heath Cullens
    Writer:David Hornsby

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  10. It's Always Sunny in Philadelphia Season 18 Episode 7 - Gilligan's Island: A Conspiracy Theorist's Paradise
    6.6/10(1183 votes)

    S18:E7

    Mac and Charlie drink the proverbial Kool-Aid while trying to uncover the mystery of why 'Gilligan's Island' never made it to 100 episodes.

    Director:Heath Cullens
    Writers:David Hornsby, Biniam Bizuneh

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Season 18 Ratings Summary

"The Guys Have a Sleepover" is the best rated episode of It's Always Sunny in Philadelphia season 18. It scored 9.0/10 from 1,000 votes. Directed by Todd Biermann and written by Glenn Howerton, Charlie Day, it aired on October 12, 2026. This episode is rated 0.5 points higher than the second-best, "Frank's Team: A Dark Day for Baseball".